26922557 has 2 divisors, whose sum is σ = 26922558. Its totient is φ = 26922556.

The previous prime is 26922551. The next prime is 26922559. The reversal of 26922557 is 75522962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21215236 + 5707321 = 4606^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 26922557 - 2⁴ = 26922541 is a prime.

Together with 26922559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26922557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26922551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13461278 + 13461279.

It is an arithmetic number, because the mean of its divisors is an integer number (13461279).

Almost surely, 2^26922557 is an apocalyptic number.

It is an amenable number.

26922557 is a deficient number, since it is larger than the sum of its proper divisors (1).

26922557 is an equidigital number, since it uses as much as digits as its factorization.

26922557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 26922557 is about 5188.6951153445. The cubic root of 26922557 is about 299.7128994059.

The spelling of 26922557 in words is "twenty-six million, nine hundred twenty-two thousand, five hundred fifty-seven".